Your assesment of the Sox' inability to acquire premium pitching is completely and utterly incorrect, and I will explain why. Besides of the inherent difficulty that comes with drafting premier pirching while not really having picks in the range required to acquire said type of pitcher, the real problem with the franchise has been its use of assets. They hold on too long to prospects they should deal, and keep kids that don't have the potential to start too long in that role, instead of converting them to relief early and creating a self-sustainable BP. With balance being the name of the game today, teams are winning when they have many ways to win, like the Royals and Texas last year.
Teams trade propspect currency for good pitching all the time. It's not a novel concept. And that's why Dombrowski was brought in. Look at the juggernaut rotation he built in Detroit when the only good pitcher he drafted was Verlander. When this team manages a better use of its MiLB resources, they will be able to create another winner. It's not about drafting pitching, it's about drafting valuable assets.